cloud-fan commented on code in PR #36714:
URL: https://github.com/apache/spark/pull/36714#discussion_r886739715
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sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/percentiles.scala:
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@@ -359,6 +359,32 @@ case class Percentile(
)
}
+// scalastyle:off line.size.limit
+@ExpressionDescription(
+ usage = "_FUNC_(col) - Returns the median of numeric or ansi interval column
`col`.",
+ examples = """
+ Examples:
+ > SELECT _FUNC_(col) FROM VALUES (0), (10) AS tab(col);
+ 5.0
+ > SELECT _FUNC_(col) FROM VALUES (INTERVAL '0' MONTH), (INTERVAL '10'
MONTH) AS tab(col);
+ 5.0
+ """,
+ group = "agg_funcs",
+ since = "3.4.0")
+// scalastyle:on line.size.limit
+case class Median(child: Expression)
+ extends AggregateFunction
+ with RuntimeReplaceableAggregate
+ with ImplicitCastInputTypes
+ with UnaryLike[Expression] {
+ private lazy val percentile = new Percentile(child, Literal(0.5, DoubleType))
+ override def replacement: Expression = percentile
+ override def nodeName: String = "median"
+ override def inputTypes: Seq[AbstractDataType] =
percentile.inputTypes.take(1)
Review Comment:
isn't it just `Seq(DoubleType)`?
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